$20 Cheap flights to Boulder County

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Top places to visit in Boulder County

A street corner with a traffic light, a street sign reading "Pearl St Mall 1900", and a brick building with multiple windows.
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Boulder

Boulder
A snow-capped mountain range with a visible moon in the sky.
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Longmont

Longmont
A historic stone building with a reflection in calm water, surrounded by a fence and trees.
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FlightsFlights

Louisville

Louisville

Cheap flights to Boulder County from $20 One Way, $40 Round Trip

$40 return flights and $20 one-way flights to Boulder County were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Feb 23 - Sat, Feb 27
DFW
Dallas
DEN
Denver
$40 Roundtrip, found 1 hour ago
$40
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Feb 23 from Dallas to Denver, returning Sat, Feb 27, priced at $40 found 1 hour ago
Thu, Dec 3 - Thu, Dec 10
LAX
Los Angeles
DEN
Denver
$59 Roundtrip, found 4 days ago
$59
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Dec 3 from Los Angeles to Denver, returning Thu, Dec 10, priced at $59 found 4 days ago
Wed, Oct 28 - Sat, Oct 31
ORD
Chicago
DEN
Denver
$80 Roundtrip, just found
$80
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Oct 28 from Chicago to Denver, returning Sat, Oct 31, priced at $80 just found
Mon, Nov 9 - Mon, Nov 16
IAH
Houston
DEN
Denver
$80 Roundtrip, found 1 hour ago
$80
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Nov 9 from Houston to Denver, returning Mon, Nov 16, priced at $80 found 1 hour ago
Wed, Oct 28 - Mon, Nov 2
DAL
Dallas
DEN
Denver
$137 Roundtrip, found 6 days ago
$137
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Oct 28 from Dallas to Denver, returning Mon, Nov 2, priced at $137 found 6 days ago
Thu, Nov 5 - Mon, Nov 9
LAX
Los Angeles
DEN
Denver
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Delta flight, departing Thu, Nov 5 from Los Angeles to Denver, returning Mon, Nov 9, priced at $157 just found
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Deals For This Weekend's Flights

OriginDestinationTravel DatesFlights From*
LAXDenverOctober 17 to October 24$272
PHXDenverOctober 17 to October 17$274
DFWDenverOctober 17 to October 24$300
MSPDenverOctober 18 to October 21$331
ORDDenverOctober 17 to October 19$356
TTNDenverOctober 17 to October 24$369
MIADenverOctober 18 to October 22$408
EWRDenverOctober 17 to October 20$443
ATLDenverOctober 17 to October 20$468
BOSDenverOctober 16 to October 19$524
*Prices include taxes and fees

Find The Perfect Hotel For After Your Flight

Score Epic Boulder County Accommodation Deals

Hotel Boulderado

Hotel Boulderado

4 out of 5
2115 13th St Boulder CO
Fully refundableReserve now, pay when you stay
$163 nightly
The price is $187 total per night from Nov 2 to Nov 3
$187 total
Nov 2 - Nov 3
Total with taxes and fees
Book a stay at this luxury hotel in Boulder. Enjoy free WiFi, 2 restaurants, and breakfast (surcharge). Our guests praise the restaurant and the bar in our reviews. ...
Opens in a new windowHotel Boulderado
Limelight Boulder

Limelight Boulder

4 out of 5
1295 University Ave Boulder CO
Fully refundableReserve now, pay when you stay
$209 nightly
The price is $240 total per night from Nov 1 to Nov 2
$240 total
Nov 1 - Nov 2
Total with taxes and fees
Book a stay at this family-friendly hotel in Boulder. Enjoy free WiFi, 2 bars/lounges, and a rooftop terrace. Popular attractions Pearl Street Mall and Folsom ...
9.8/10 Exceptional! (411 reviews)
"Great location in Boulder - walking distance to campus and Pearl Street, easy access for a quick drive to hiking locations. Pool deck and outdoor areas are great!"

Reviewed on Oct 12, 2026

Opens in a new windowLimelight Boulder
Hotel Longmont

Hotel Longmont

3 out of 5
508 3rd Ave Longmont CO
Fully refundable
$125 nightly
The price is $141 total per night from Oct 25 to Oct 26
$141 total
Oct 25 - Oct 26
Total with taxes and fees
Stay at this hotel in Longmont. Enjoy free WiFi, breakfast (surcharge), and parking (surcharge). Popular attractions Wibby Brewing and City of Longmont Callahan ...
Opens in a new windowHotel Longmont
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Comfort Inn & Suites Boulder

Comfort Inn & Suites Boulder

3 out of 5
4777 North Broadway Boulder CO
Fully refundable
$110 nightly
The price is $126 total per night from Nov 2 to Nov 3
$126 total
Nov 2 - Nov 3
Total with taxes and fees
Book a stay at this business-friendly hotel in Boulder. Enjoy free breakfast, free WiFi, and an outdoor pool. Our guests praise the breakfast and the helpful ...
Opens in a new windowComfort Inn & Suites Boulder
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Need a Car For After Your Flight?

Midsize SUV

Nissan Rogue
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Nissan Rogue

$2

$49 total
found 1 hour ago
Midsize SUV Nissan Rogue

Special SUV

Jeep Wrangler
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Jeep Wrangler

$3

$51 total
found 3 hours ago
Special SUV Jeep Wrangler

Fullsize SUV

Dodge Durango
  • 7 people
  • Unlimited mileage
COMMERCE CITY, USA
Dodge Durango

$4

$54 total
found 1 hour ago
Fullsize SUV Dodge Durango

Compact SUV

Kia Seltos
  • 5 people
  • Unlimited mileage
COMMERCE CITY, USA
Kia Seltos

$5

$56 total
found 1 hour ago
Compact SUV Kia Seltos

Boulder County

Save more on flights to Boulder County while making top-quality travel arrangements. At Orbitz we provide access to low cost flights, hotel lodgings and other discounts, along with superior customer service and an unbeatable satisfaction guarantee.

Compare And Book Discount Flights to Boulder County

Now it is easier than ever to find a discount Boulder County flight. Orbitz users can compare airfares for both international and domestic flights and can quickly determine the best hotels and car rental companies to use. You may also check out hotel and other reviews along with a number of travel tips, making your visit to an unfamiliar destination enjoyable and hassle-free.

Use Your Mobile Phone To Secure A Low Cost Flight To Boulder County

We now offer free apps for the most commonly used mobile devices. You can use your mobile phone to share relevant information pertaining to your trips, view images of local lodgings and take advantage of hotel and car rental discounts that may be available only to mobile device users.

Boost Your Frequent Flyer Rewards

You even retain your ability to earn frequent flier points and rewards when purchasing your tickets with Orbitz for Boulder County flights. Enter your frequent flyer information into your Orbitz profile to start earning rewards.

You will find that Orbitz is a very low cost, yet very effective travel planner. Free updates via your mobile phone device will help to keep you and all relevant parties informed of important flight updates. With access to unbeatable sales on all travel essentials, Orbitz makes booking an affordable flight to Boulder County a breeze.

Frequently asked questions

Which airlines fly to Boulder County?
With 12 airlines waiting to spirit you away to Boulder County, finding a suitable flight will be a breeze. Book your fare with one of these top carriers that offer services to Denver Intl. Airport (DEN):

  • United Airlines - 269 flights to Boulder County per month
  • Southwest Airlines - 88 flights to Boulder County per month
  • Air Canada - 83 flights to Boulder County per month

How much is a flight to Boulder County?
If you're searching for flights back and forth, airfares ranged between $40 and $524 this past week. The lowest one-way ticket prices were $20, departing from Dallas (DFW).
How to book the cheapest flight to Boulder County?
With Orbitz, you'll find some of the most amazing flight deals around from a big range of airlines. But if you'd like to increase your chances of landing cheap flights to Boulder County, here are some suggestions we think will help:

  • Taking off from or arriving at other airports can sometimes be cheaper. Enter your preferred departure and arrival airports. Next, select the 'Nearby airports' function below to explore your options.
  • Also, click on the 'Show flexible dates' link to bring up the prices for days around your chosen departure. It's possible to score cheaper flight deals if you're flexible with your schedule.
  • To filter your results, hit 'Show options.' You can search based on airlines, seating class, nonstop flights and refundable flights. You can also choose your preferred flight times under 'Sort & Filter' to the left.
  • The early bird catches the best deals, so purchase your seats once you've settled on your travel dates. The most affordable airfares sell like hotcakes and prices normally climb as the departure date nears.
  • Bundle your flights, hotels and car rental into an impressive package deal. Save your money for things that really excite you, like discovering every corner of Boulder County.
  • Don't travel during peak seasons if possible. By avoiding summer and school vacations, you can make superb savings on your airfares.

What is the best time to book a flight to Boulder County?
Book your flights to Boulder County in January. This is the perfect time of the year for low prices, followed by February and August. Find cheap flights and make your dream journey a reality with Orbitz.
What day of the week is the cheapest to book a flight to Boulder County?
Get a great flight deal by booking on a Tuesday, Wednesday or Saturday. Typically, these are the best days to pick up cheap fares to Boulder County.
What is the cheapest day of the week to fly to Boulder County?
You can land cheap flights to Boulder County by flying out on a Monday, according to Orbitz data from 2020. Tuesday is also more affordable, while Saturday has the most expensive ticket prices. Whether you prefer to save cash or take off on any day that's convenient, you'll always find a terrific deal with Orbitz.
What is the cheapest month to fly to Boulder County?
To score cheap flights to Boulder County, you should depart in August. If getting a great deal on your ticket is your number one priority, Orbitz data has found that this is generally an excellent month to travel. June is when airfares are the most expensive.
Which airlines allow free cancellation?
Plans change, and your ticket should be able to do the same. That's why Orbitz makes it a cinch to search for flights with no change fees and free cancellation. Just enter your departure and arrival destinations and then select "Filter by flexible change policies." How's that for fuss-free?
What do I need for the flight to Boulder County?
Nothing's more fun than flying somewhere new, but it pays to be prepared. These top tips will help get your trip off to a smooth start:

  • Before you step foot on the plane, you'll need to show some form of government-issued ID, like a passport. You'll also need your boarding pass. If you're traveling with children, check with your airline about which documents they may need.
  • To keep you entertained on the short trip to Boulder County, download some new music or restock the audiobook library on your phone. Food can also be a good distraction while in the air, so maybe even bring some snacks.
  • It can get cool on the plane. If you'd prefer not to shiver your way through the flight, wear an extra layer of clothes.

How do I get cheap first-class/business deals to Boulder County?
There are ways of booking first or business-class fares to Boulder County that won't burn through your wallet. Pick up a seat at the front of the plane for less with these great tips:

  • Be flexible with your travel dates and hold out for huge sales on first or business-class airfares.
  • Many low-cost carriers nowadays have terrific business-class seating for a wallet-friendly price.
  • Bid for an upgrade in online auctions (if available) or upgrade your seat with points earned through loyalty programs.

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.